Judging from the view from Picard's window, Starbase Earhart was at least partly located on the surface of a planet. The scenery seen outside of Picard's quarters was actually a reused model from the science fiction movie Logan's Run from 1976. The same prop had already been reused in Star Trek V: The Final Frontier (as a backdrop for the conversation with Bob) and TNG: "Final Mission" (seen behind chairman Songi). [1]

As it was the case for all Federation computers in TNG, DS9, and VOY, the computer voice of Starbase Earhart was provided by Majel Barrett.

In the Star Trek: The Lost Era novel Well of Souls, Ensign Batanides meets CommanderRachel Garrett at Starbase Earhart, who is there awaiting transfer to the USS Carthage, where she will assume the position of first officer. The two women strike up a casual friendship, but they only meet each other for a couple of drinks at the local bar before they both go their separate ways.